Thumbnail and Featured Image not Showing after last WP Smush update

Hi Kasia,

Actually, in our system, the user will upload an image from a form in frontend and we have save that image and assigned it as featured image of the article.

I have used these WP functions to assigned featured image with thumbnails.

================================================
$filetype = wp_check_filetype( basename( $bannerimg ), null );

$attachment = array(
‘guid’ => $bannerimg,
‘post_mime_type’ => $filetype[‘type’],
‘post_title’ => preg_replace( ‘/.[^.]+$/’, ”, basename( $bannerimg ) ),
‘post_content’ => ”,
‘post_status’ => ‘inherit’
);

$attach_id = wp_insert_attachment( $attachment, $bannerimg, $new_webinar_id );
require_once(ABSPATH . “wp-admin” . ‘/includes/image.php’);

$attach_data = wp_generate_attachment_metadata( $attach_id, $bannerimg );

wp_update_attachment_metadata( $attach_id, $attach_data );

set_post_thumbnail( $new_webinar_id, $attach_id );
=================================================

So function wp_update_attachment_metadata() is not working when WP-Smush is active. So attachment information is not updated with thumbnail information and thumbnails is not showing. It happened after the last update, so we suspect it is causing the problem.

Can you look it?

Thanks